Control valve



Oct- 7, 1941 R. B. EvERsoN 2,258,485

` CONTROL lVALVE Filed Dec. 1l, 1959 v Patented ct. V1941` el UNITED; STATES PATENT cpp-ICE] Applieatioerls .3I-)8,5a3 ;v

1 claim. l v(ci. sof-24) My invention relates to valves for regulating and controlling the flow of a liquid or fluid and it has especial reference to a valve interposed in a conduit or pipethrough which a fluid under pressure is permitted tovilow when the valve is overbalanced under the inuence of a vacuum created by a suction device.

A valve of-this character is well-adapted for use inv apparatus `for the treatment and purification of water through vthe medium of chlorine in either a gaseous or liquid state. In connection with my present structure the chlorine is led to the valve under pressure and the valve is provided with means which overbalance this pressure to an extent suiilcient to maintain the valve closed whenever the flow is stopped. A manually regulated conduit or pipe Acommunicates with 1 the valve and leads to a suction or vacuum creating device, and when this vacuum enters the valve chamber it counter-acts the influence of the pressure and the valve is unbalanced to permit flow of the fluid therethrough.` The means which I employ to balance the valve with relation to the pressure is actuated solely by gravity and it is in the form of a dead-weight mass so that at all times it exerts a positive, constant, and unvarying pull that is ofutmost dependability. Weights of different sizes may be readily incorporated in the valve whenever the character of the service requires adjustment or change. The mass issuspended from or hangs free upon a diaphragm element that is operatively connected with and actuates the valve member for opening and closing the port communicating .with the valve seat. By the use of a weight in the manner above suggested I am ableto sucstantially the manner hereinafter fully described and` particularly pointed out in the appended claim. Reference is made to the accompanying drawing that forms a part hereof.

In thev drawing:

Figure 1 is a view in elevation, partly broken away, showing my improved Valve.

Figure 2 is a sectionalview drawn to a larger`r scale. e Y

Figure 3 is a view, partly in section, of the upper dome portion of the housing.

The drawing 'is more or less schematic and discloses a typical or preferred embodiment of my invention, and like reference characters are used cessfully overcome the inherent characteristic of v springs, levers and mechanical movement to expand and contract under the influence of hanges in temperature, vand furthermore, I avoid the usual wear incident to connected moving parts, as well as erosion incident to atmospheric conditions.

The manner in which I connect the weight element or mass to the valve spindle is unique; the construction and disposition of the operative portions of my valve are devised to -permit the quick assembly or disassembly thereof at all times; and the parts are arranged in a compact manner for economy of space.` My valve is unusually dependable in operation; it contains no working parts that are liable to get out of order; and it is comparatively inexpensive to produce so that it may be soldffor a reasonable retail price.

in the different figures to identify the same parts wherever they appear.

4The valve herein disclosed comprises a hollow body or housing consisting of superposed diskshaped upper and lower members 5 and Ii, the opposing faces of which are dished to provide an inner chamber, and said membersare secured together by bolts 8 or vthe like. A `flexible diaphragm 'l has its -rim interposed and anchored between the members 5 and 6, thus dividing the chamber into upper' and lower portions that do not communicate with eachA other.l The lowerr member 6 of the housing has a central opening into `,which a hollow cylinder 9, having a closed outer end, `is screwed in order to providea Well I0 in which the weight or mass I'I is disposed. A lug member I2 is secured to and depends from the underside of the diaphragm in a position to be above and in alinement with the weight II and said lug is provided with an aperture to removably receive a hook I3 carried by the upper endof the weight. This construction permits the-well to be readily removed for the purpose of cleaning the same, or for changing the mass II should the service require modification.'

The upper portion of the chamber insidethe y housingvis provided with an outlet port M that communicates with a pipe or'conduit I5 leading to a source of suction or vacuum creating means. Theflow of liquid or gas through the conduit or pipe I5 is regulated by a hand operated valve I6. The central portion of the upper member 5 of the housing is formed with a dome I'Iv that extends a distance above the housing and is preferably cast integral withA the top member 5, and-its ine' terior is a part of the upper portion of the chamber above the diaphragm 1. The cylindrical side wall of the dome is providedwith a lateral opening or transverse bore I8 to receive a hollow stub I9 that enters the interior of lthe dome transversely and extends across the axis of the latter.

later-s1 its either liquid or laseous form and maintained under suillcient pressure to'force its now from the tank. AThe stub has an annular exterior flange ila whereby it is secured-against the outer face of the dome by screws or bolts to permit it i toy be readily-removed when desired. Atthe inner end oi' the stub there is a transverse valve port 22 of the stub to provide a continuation of the bore of the stub, and

amidport,communicates at itsupDer end with a tapered valve seat 2l in the upper circumference Y enne stub; Thus it win be seen that liquid or gas under pressure entering the stub il through the vpipe `2I discharges through the valve port 22past the valve seat'and' into the dome Il, and hows-from the dome down intoth'e upper chamber-oi the housing from which it is discharged through the outlet il, v

The upper face of the diaphragm `'i has an embossment 24 secured to it'from, which arises an uprightllost 28 or the like.j the post and the embossment being preferably 4disposed within portions ofthe dome and the chamber of the housing. Said post provides a foot or support for a yoke 26 that is located in the upper portion of `Y y l the dome and which surrounds the inner portion of the stub l0.` 'I'he yoke 2611s preferably a metal `block of cylindrical shape faceisconcentric with the inner Isurface of the sothat its outer surever. when 4the valve Il is opened. the diaphragm -is under the iniiuence oi' the vacuum or suction in pipe Il and said diaphragm rises and lifts the t weight in proportion to the amount of pull exertedby the vacuum. This causes the yoke 2l 4to move upward, thus unseating .the valve and permitting the gas or liquid to ilow through the overcome the pressure and will move the dia- "1 phragm downward to close the valve.

i are usually made, would be liable to bulge into dome il,4 and it is of adiameter vthat is slightly lessthan the inside of the dome. The yoke 25 is provided with a vtrans-axial bore 21 of 'a larger diameter than the diameter of the adjacent portion of stub i9 so there is sufllcient clearance betweenfthis bore' and the stub to permit theyoke to move up and down vmaking contact with the stub. 'I'he top wall of the dome is provided with a threaded, axial aperture!! that is made in the top wall of the dome to receive theshank of a hollow cap-screw 29, and the hollow portion 20 preferably without of this cap-screw provides a guide `for an exf tenslonll on the top of the yoke, permitting they structure. to reciprocate whenever the yokeis moved up or down to .open or close the valve. A screw-threaded bore 32 is made in this extension 3i and extends down through theyoke where its diameter is enlarged as at 33. The threaded spindle or. shank 34 having a conical-shaped needle-valve 35 on its lowerend is screwed into the bore and may be secured in adjusted positions by'a lock-nut 28. 'I'he needle valve alines with thel valve seat and port in the inner end of stub il and it is actuated by iluctuations or movements of the diaphragm.

The weight i I is a positive, gravity-operated.

' element and it is not affected by the changes of i temperature nor is it subject to deterioration. It.

therefore, provides s.v positive and constant balance which'reqires no attention or adjustmentto accommodate it to atmospheric condi- -`tions. The mass ii may be readily changed ifdesired. for anotherof diileren't weight whenever thefservice requires. It will -beunderstood the mass or weight il'is suillclent to resist the presis Vnot in use, the mass pulls the yokedown and seats the needle valve to close thelwrt 22. Howtending across said chamber;

the well and become distorted or even ruptured. In order to prevent injury to the diaphragm. I

secure a rigid plate I1 to the bottom surface of the diaphragm 1 in any suitable manner, and preferably form the apertured lug or ring I2 integral with this plate. As will be Seen. the plate 31 is a vwidedisl: of greater dimensions than the inside diameter of the well 9, and there is preferably a suitable shoulder or recess' 38 in the lower member 6 of the housing extending around the margin of the opening into which the well is screwed. The plate 3l is relatively stiif so that should the diaphragm be accidentally forced down too far the plate will cover the opening and be seated on the shoulder or recess 38 and thus prevent the bulging or damaging of the diaphragm. As soon as pressure is relieved the diaphragm will move upwardly and unseat the plate 3l from the shoulder or recess 3l.

What I claim is:

A lvalve structure embodying relatively flat dished vmembers superposed upon each other to constitute a shallow chamber; a diaphragm exa hollow dome pro- Jecting up from the top member and having free communication with the portion of said chamber v l.above said diaphragm: an upstandins post ex:

member and having free communication with in said pipe;

said cylindrical element,

said chamber below said diaphragm; an-inletpipe extending transversely across said dome adapted to admit iluid thereto and to the upper portion of said diaphragm chamber; a valve-port a suction outlet-port leading from said chamber; a vacuum regulating conduit communicating with said outlet-port, whereby a fluid drawn through said dome and the upper portion of said chamber will tend to move said diaphragm upwardly towards said dome; a weight suspended from said diaphragm and disposed in said weight normally urging said diaphragm in a direction away from said dome; a yoke on said post extending aboutv said Iinlet-pipe, and a needle-valve coacting with said valve-port for controlling the flow of fluid therethrough, said valve bodily supported upon said yoke, whereby to be actuatedy by said diaphragm.

ROY B. EVERSON. 

